Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2013		Oct. 31, 2012		Oct. 31, 2011
schedule of revenues by geographic area [Line Items]
Revenues	$ 55,157	$ 53,707	$ 42,436	$ 36,358	$ 35,420	$ 29,693	$ 24,153	$ 31,337	$ 187,658	[1]	$ 120,603	[1]	$ 122,570	[1]
UNITED STATES
schedule of revenues by geographic area [Line Items]
Revenues									80,199		26,929		66,531
south korea [Domain]
schedule of revenues by geographic area [Line Items]
Revenues									101,928		92,163		53,256
UNITED KINGDOM
schedule of revenues by geographic area [Line Items]
Revenues									2,036		1,061		1,639
INDONESIA
schedule of revenues by geographic area [Line Items]
Revenues									0		147		675
GERMANY
schedule of revenues by geographic area [Line Items]
Revenues									1,503		128		290
CANADA
schedule of revenues by geographic area [Line Items]
Revenues									1,912		175		156
SPAIN
schedule of revenues by geographic area [Line Items]
Revenues									80		0		0
JAPAN
schedule of revenues by geographic area [Line Items]
Revenues									$ 0		$ 0		$ 23

[1] Includes revenue from a related party. Refer to Concentrations in note 1 to the financial statements.